Math, asked by athwal456, 9 months ago

answer please ......

Class 11th chp: Mathematical Induction...

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Answered by 217him217

1

Answer:

first put n=1

7-3 = 4

n=2

49-9 = 40

n=3

343-27 = 316

upto....... n

4,40,360,..... 7^n-3^n all no. divisible by 4 so that (7^n - 3^n) is also divisible by 4

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